NPDES Level 1A Practice Test Questions
and Answers| Updated
A slope gradient of 25% (4:1) would indicate that in a horizontal length of 100 feet,
the vertical rise would be ______ feet.
A) 2.5
B) 12.5
C) 25
D) 4
C) 25
As rain falls to the earth, what is the very first function of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
A) It reduces detachment
Because of the likelihood of thunderstorms which is the worst month to schedule
land disturbing activities?
A) April
, B) July
C) September
D) October
B) July
Which of the following is not a stage in Erosion and Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
B) Solubility
At what depth must sediment be removed from a silt fence barrier?
A) 12 Inches
B) 16 Inches
C) 1/4 full
D) 1/2 full
D) 1/2 full
and Answers| Updated
A slope gradient of 25% (4:1) would indicate that in a horizontal length of 100 feet,
the vertical rise would be ______ feet.
A) 2.5
B) 12.5
C) 25
D) 4
C) 25
As rain falls to the earth, what is the very first function of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
A) It reduces detachment
Because of the likelihood of thunderstorms which is the worst month to schedule
land disturbing activities?
A) April
, B) July
C) September
D) October
B) July
Which of the following is not a stage in Erosion and Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
B) Solubility
At what depth must sediment be removed from a silt fence barrier?
A) 12 Inches
B) 16 Inches
C) 1/4 full
D) 1/2 full
D) 1/2 full
